Rear brake drum to disc upgrade - Chevy Malibu Forum: Chevrolet Malibu Forums
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post #1 of 7 (permalink) Old 03-17-2019, 02:29 AM Thread Starter
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Rear brake drum to disc upgrade

Hello. This is my first time posting. I have an 07 Malibu LS sedan with a 2.2L ecotec. Currently looking into doing a drum to disc brake upgrade. My question is about the proportioning valve. Would I actually need a different valve to make the conversion work or will the calipers work with the one I have? I couldn't find any listing with a different part number from the one I have but on some sites it says to use only with a front disc rear drum system. Even checked at a GM dealership. It's the only part number listed. The only option from that is an ABS pressure modulator but, my Malibu doesn't have ABS. Any help is greatly appreciated. Thanks
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post #2 of 7 (permalink) Old 03-17-2019, 04:35 AM
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Re: Rear brake drum to disc upgrade

Check out this thread and the comment from member @RalphP.


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post #3 of 7 (permalink) Old 03-17-2019, 07:25 AM
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Re: Rear brake drum to disc upgrade

Wow first time i heard of these cars coming without abs!
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post #4 of 7 (permalink) Old 03-17-2019, 07:37 AM
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Re: Rear brake drum to disc upgrade

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Wow first time i heard of these cars coming without abs!
For a long time, it depended on the trim level.. a low-end wouldn't, but an LT or LTZ would.

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post #5 of 7 (permalink) Old 03-18-2019, 02:05 PM
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Re: Rear brake drum to disc upgrade

Just wierd..... in 2007.... i didnt know ANY car that had no abs lol....learn something new everyday
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post #6 of 7 (permalink) Old 03-28-2019, 07:31 AM Thread Starter
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So, through a bit of research, I found that the base level G6 (same platform) came with 4 wheel disc non ABS. I then went to ACDelco's website and found that there was a different part number for the proportioning valve on said G6 (ACD# 15821482) and in the picture, the outward appearance was just like mine. So I'm thinking the internals are different and it will bolt right in. PERFECT!!! Except, the part has been discontinued. Called all the local salvage yards and looked all over the interwebs for a needle in a haystack. Put a request in on junkyarddog.com and got a response the next day. After a conversation on the phone, I paid more than expected, got the part shipped in a few days, installed everything and drove it home that night. It stops a lot better now. Lol.
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post #7 of 7 (permalink) Old 03-28-2019, 12:00 PM
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Re: Rear brake drum to disc upgrade

Good job following through and making it all happen!
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